I combine Trader Joe’s and Costco. Between the two I can get just about everything in the way of food. Then there’s Walmart for cleaning supplies, etc.
There seems to be no overlap in the type of people who shop at any of them. Trader Joe’s is full of skinny libs. The Costco I go to seems to have a lot of Republicans who drive Mercedes. (And they too return their shopping carts.) Walmart - well - nobody who shops at Walmart seems to go hungry and they don’t return their carts.
If it makes you feel better, I return my cart almost every time no matter where I shop. Unless I’m feeling rebellious.